Preamplifiers

Pass Labs XP-10 Stereo Preamplifier

ARTICLE INDEX

The Design

The XP-10 is a fully balanced solid state preamplifier. It has two gain stages and operates in pure Class A. There is no global negative feedback. The overall design results in the minimum amount of circuit path, which keeps signal loss at the lowest possible level.

It is said that the XP improvements over the previous model include deeper bass and better detail.

The front panel has buttons from left to right for Mute, Mode (Dims the LED Panel), and Input Selector. The large volume control (I have big hands and really appreciate big volume control dials) is on the right hand side, and it can be spun continuously, changing the volume through an optical encoder. It reads from 0 to 83, in 1 dB steps, with 75 being unity gain. The pass-through connection using input 5 sets the volume at 75 so that whatever SSP processor voltage that passes through to the power amplifier will be very close to what it was going into the XP-10.

The rear panel is shown below.

On the far left is the grounded AC receptacle. Most of the panel is occupied by the inputs and outputs. From the left is one pair of RCA outputs, one pair of XLR outputs, the Pass-through RCA input pair, two more pairs of RCA inputs, and two pairs of XLR inputs.

The remote control is the same one used for the XP-20 and XP-30. Simple, attractive, functional.